Rising water is in the forecast along some already flooding Mid-Michigan rivers as rain falls on saturated watersheds.
The National Weather Service says the Saginaw River at Saginaw in central Michigan was 2.6 feet above flood stage Wednesday. It should crest at 5 feet above flood stage Sunday or Monday.
Up to 4 inches of rain could fall on parts of the state through Friday.
"After a brief break from the wet weather, we will once again receive significant amounts of rain through Friday," said TV5 meteorologist Lauren Fahrenkrug. "Heavy rain and a few thunderstorms will move through tonight as a warm front approaches Mid-Michigan."
Fahrenkrug said temperatures overnight will fall to the low 40s early, then increase toward sunrise. Tomorrow will be a warm day with many spots reaching 70. "The rain continues Thursday, along with thunderstorms," continued Fahrenkrug. "We have an elevated risk for severe weather tomorrow, mainly because of a damaging wind threat."
Other flooded rivers include the Rifle River north of Bay City, the Chippewa River in Isabella County and the Muskegon River near Muskegon.
In western Michigan, the weather service says the Grand River was 2.3 feet over flood stage upstream from Grand Rapids and was 1.4 feet over farther downstream in Ottawa County's Robinson Township.
Newaygo County has declared a state of emergency for its portion of the Muskegon River.
Copyright 2013 WNEM (Meredith Corporation). All rights reserved. The Associated Press contributed to this report.